Dust-retaining device for can-filling machines



C. T. SMALL.

DUST RETAINING DEVICE FOR CAN FILLING MACHINES. APPLICATION FILED EB.19. 1919.

1,438,663., mama Oct. 31, 1922 INVENTOR.

I GT Small.

ATTORNEY.

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Patented {left 31, M22

. m t l CI-IESLEY T. SMALL, OF ST. LOUIS, MISSOURI. T0 lllilfillillfl11L IN SUI. 11011155, 015 LGUIS. new

DUST-RETAINING DEVICE CAN-FILLIT Tit LWEACEIINES;

Application. filed February 19, 1919.

To all whom it may concern. v, Be it known that l, Cr-rnsnnr T; SMALL, acitizen of the United States ot l-Xmcrica, residing at the city of St.Louis, State of lvlissourhllnited States of America, have inventedacertain. new and useful Dust-litetaining Device for Can-Fillinghlachines, of which the following is such a full, clear, and exactdescription as will enable any one skilled in the art to which itappertains to make and use the same, reference being had to theaccompanying drawings, forming part of this specification.

My invention relates to a dust retaining device for can filling machinesand is more particularly intended for use with the can.

filling machine shown and described in my prior application Serial No.184,990 filed August 8, 1917. It may, however, be used. with various"forms of can filling machines.

In the accompanying drawings which illustrate one form of dust retainingdevice made in accordance with my invention, Figure 1 is a verticalsection. Figure 2 is an enlarged sectional view showing a detail ofconstruction, Figure 3 is a view partly in elevation and partly invertical section showing a slight modification, and Figure l is asection taken on the line 4- 1 of Fig ure 3.

10 indicates a nozzle carrying member which may be the nozzle carryingdis: shown in my prior patent above referred to. Resting upon the disc10 is a wear plate 11. 12 is a nozzle base which extends through theplates 10 and 11 terminating flush with the upper face of the plate 11.As shown in Figure 1, the base 12 is provided with threads 13 engagingwith corresponding threads in the plate 10 to hold the base in position.The base 12 is also provided with a horizontal flange 1% adapted toengage with the lower face of the plate 10.

In the modification shown in Figure 3 of the drawings the threads 18 areomitted and the base is held in position by means of cap screws 15extending through the flange A into the plate 10.

Extending downwardly from the center of the base 12 is a nozzle 16 theupper end of which is surrounded by a recess 30 forming a spring pocketfor a purpose hereim after to be set forth. Slidingly mounted on thenozzle 16 is a canopy comprising a Serial no. evaese.

central disc shaped portion 17 with an opening corresponding in sizewith the nozzle 16, an outwardly inclined portion 18 adapted to contactwith the can 19 or other receptacle to be filled, and horizontal flange20 provided. w an upturned edge 22 is coil spring the-lower end of 21.which rests upon the flange 20 and the upper end of which contacts withthe lower tace of the nozzle base 12. .The coil spring may be helical inform, but I prefer make it a conical s iral. the lanerend the cone beingplaced at the bottom as f: elves better find that this form of sprinresults in holding the canopy snugly agaist provided the top of the canthroughout the range I of movement '01"- the can. In order to hold thecanopy in. position, .1 provide the nozzle 16 adjacent to its lower endwith an annular groove 23 adapted to contain a split ring 24: 01'resilient material. This ring 24 is provided with a rounded upper edgeand a rounded lower edge as best shown in Figure 2 to prevent the ringfrom catching on the inturned edge of the can 19 when entering andleaving the can. The nozzle is preferablv provided with a beveled edge 2below the groove 28.

The operation of my device is as follows, the parts normally stand inthe position shown in Figure 1 of the drawings the can 19 or otherreceptacle to be filled is raised by suitable mechanism so that itsupper edge will contact with the inclined portion 18 of the canopy afterwhich the parts are raised into the position shown in igure 3, thespring 22 being compressed and housed within the spring pocket 30. Thematerial to be filled isnow allowed to enter through the central opening26 of the nozzle after which the material is cut oil and the can allowedto recede to its normal position. The material contained within thenozzle 28 will be discharged into the can and as the canopy projectsbelow the end of the nozzle the material 29 may be allowed to heap upabove the edge 01 the can as shown in Figure 1 so that after beingallowed to settle in position it will completely fill the can. it willbe understood that the amount 01 material fed into the can will dependupon the diameter and length of the nozzle 16 relative to the diameterand length of the can 19. In case the nozzle 16 is considerably smallerthan the can and extends substantiallyto the bottom of the same as shownin Figure 3 a less amount of material will be fed into the can than thefull capacity of the can. As the split ring 24 is readily removable fromthe annular groove 23 the canopy may be readily removed from the nozzleand replaced with a canopy of different size when cans of a differentsize are to be filled.

Having fully described my invention, what I claim as new and desire tosecure byv Letters Patent of the United States is:

1. The combination with a nozzle carrying member of a nozzle carriedthereby and projectingbelow the same and adapted to enter the receptacleto be filled, a dust retaining member slidingly mounted on said nozzleand adapted to engage with the receptacle to be filled, said nozzlebeing provided with an annular groove, and a split ring removablyengaging with said groove to hold said dust retaining member inposition.

2. The combination with a nozzle carrying member of a nozzle carriedthereby and projecting below the same and adapted to 1 ssess enter thereceptacle to be filled, a dust retaining member slidingly mounted onsaid nozzle and adapted to engage with the receptacle to be filled, saidnozzlebeing provided with an annular groove, and a split ring engagingwith said groove to hold the dust retaining member in position, saidring being provided with rounded corners.

3. The combination with a nozzle carrying member, with a filling nozzlecarried thereby and projecting below the same and adapted to enter thereoeptacleto be filled a substantial distance to displace the contentsthereof, a canopy slidingly mounted on CHESLEY T. SMALL. [ns]

